/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.jstorm.transactional;

import java.util.ArrayList;
import java.util.List;

public class PendingBatch {
    public List<byte[]> tuples = new ArrayList<>();
    protected final Object lock = new Object();
    protected volatile boolean isActive = true;

    public PendingBatch(long batchId) {
    }

    public void addTuples(byte[] data) {
        synchronized (lock) {
            tuples.add(data);
        }
    }

    public List<byte[]> getTuples() {
        List<byte[]> ret;
        synchronized (lock) {
            isActive = false;
            ret = tuples;
            tuples = null;
        }
        return ret;
    }

    public void removeTuples() {
        synchronized (lock) {
            tuples = null;
            isActive = false;
        }
    }

    public boolean isEmpty() {
        return !isActive && (tuples == null || tuples.size() == 0);
    }

    @Override
    public String toString() {
        return "isActive: " + isActive + ", Pending tuple size:" + (tuples != null ? tuples.size() : 0);
    }
}